#include <stdio.h>

int main() {
    float lower = 0, upper = 300, step = 20;
    while(lower <= upper) {
        // printf 把打印的形参放在最前面，后面的形参依次往后排。
        printf("C:%3.2f\t%6.2f\n", lower, (lower-32) * 5.0 / 9.0);
        lower += step;
    }
    return 0;
}